efl/legacy/edje/doc/examples/lua_timer.edc

collections {
   group { name: "main";
      parts {
         part { name: "bg";
            type: RECT;
            description { state: "default" 0.0;
               color: 255 255 255 255;
            }
         }
         part { name: "label1";
            type: TEXT;
            description { state: "default" 0.0;
               color: 0 0 0 255;
               text {
                  text: "Timer delayed...";
                  font: "Sans";
                  size: 12;
                  align: 0.0 0.7;
               }
            }
         }
         part { name: "label2";
            type: TEXT;
            description { state: "default" 0.0;
               color: 0 0 0 255;
               text {
                  font: "Sans";
                  size: 12;
                  align: 0.0 0.8;
               }
            }
         }
         part { name: "label3";
            type: TEXT;
            description { state: "default" 0.0;
               color: 0 0 0 255;
               text {
                  font: "Sans";
                  size: 12;
                  align: 0.0 0.9;
               }
            }
         }
         part { name: "red_rect";
            type: RECT;
            description { state: "default" 0.0;
               color: 255 0 0 255;
               max: 30 30;
               align: 0.1 0.2;
            }
            description { state: "default" 1.0;
               inherit: "default" 0.0;
               color: 0 0 255 255;
               align: 0.9 0.2;
            }
         }
      }
      programs {
         /* Move the red rect back an forth in a loop */
         program { name: "init";
            signal: "load";
            source: "";
            action: STATE_SET "default" 1.0;
            transition: SINUSOIDAL 1.0;
            target: "red_rect";
            after: "loop";
         }
         program { name: "loop";
            action: STATE_SET "default" 0.0;
            transition: SINUSOIDAL 1.0;
            target: "red_rect";
            after: "init";
         }
         program { name: "lua_init";
            signal: "load";
            source: "";
            lua_script {
               function timer_cb()
                  /* Print Timer attributes */
                  print("## timer_cb")
                  print("   timer.pending:", timer.pending)
                  print("   timer.precision:", timer.precision)
                  print("   timer.interval:", timer.interval)

                  /* Slow down the timer */
                  timer.interval = timer.interval + 0.005

                  /* Set labels with object info */
                  ed.label1.text = "timer interval: " .. timer.interval
                  ed.label2.text = "object x: " .. ed.red_rect.geometry[1]
                  r, g, b, a = unpack(ed.red_rect.color)
                  ed.label3.text = "object color: "..r.." "..g.." ".. b

                  /* or return CALLBACK_CANCEL to stop the timer*/
                  return CALLBACK_RENEW
               end

               /* Start a new timer that will call timer_cb every 0.01s */
               timer = ed:timer(0.01, timer_cb)
               
               /* Delay the timer execution by 2s */
               timer:delay(2)
            }
         }
      }
   }
}